Expansion gasket for liquid conveyors



c. L. BARRON EXPANSION GASKET FOR LIQUID CONVEYORS Original Filed Ju1y3, 1956 Jan. 31, 1961 2,969,615

3 ATTORNEYS.

Cur-2 7's ZBa rron INVENTOR 1 I BY I I I I o EXPANSION GASKET FOR LIQUIDCONVEYORS Curtis L. Barron, Sacramento, Calif. (Rte. 2, Miles, Tex.)

Original application July 3, 1956, Ser. 'No. 595,667, now Patent No.2,843,913, dated July 22, 1958. Divided and this application May '15,1957, Ser. No. 659,309

1 Claim. 9 (Cl. 50-155) This invention relates to a liquid conveyor, andhas particular applicability to a compressible gasket adapted to beinserted in a concrete irrigation channel or duct prior to the formationand setting of the duct, to provide a compressible expansion jointbetween sections, and comprises a division of my copending applicationSerial No. 595,667, filed July 3, 1956, now Patent No. 2,843,913entitled Strato Flow Liquid Conveyor.

A primary object of this invention is the provision of an improvedcompressible joint adapted to be positioned between duct sections of aconcrete duct, the elements of the joint having anchor rods adapted tobe embedded in the abutting ends of the duct section prior to setting ofthe concrete, and held in position therein by the hardened concrete.

A further object of the invention is the provision of a joint structureof this nature provided with a plurality of holes or openings in opposedface plates, through which rubber comprising portions of a gasketpositioned between the face plates may be extruded in the form offingers during the formation of the gasket.

An additional object of the invention resides in the method of formingsuch a compressible gasket structure wherein preformed face plates ofmetal or similar material are positioned in the mold, and rubbermaterial poured therebetween in liquid form, the rubber being allowed toharden, and the assembled plates and rubber gasket then positioned in aditch, and concrete poured on opposite sides thereof to form an integralconcrete duct having expansion joints between sections.

Still other objects will in part be pointed out hereinafter as thedescription of the invention proceeds, and shown in the accompanyingdrawing, wherein there is disclosed a preferred embodiment of thisinventive concept.

In the drawing:

Figure 1 is a perspective view of a formed gasket adapted to bepositioned between adjacent duct sections.

Figure 2 is a longitudinal vertical sectional view showing the gasket inposition in a duct to be formed, a portion of a duct liner also beingdisclosed, and

Figure 3 is a sectional view taken substantially along the line 3-3 ofFigure 2 as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout theseveral views of the drawing.

Having reference now to the drawing in detail there is generallyindicated at 40 a flexible gasket assembly adapted to be positioned atspaced intervals within a ditch 15 or the like, to form a compressibleexpansion joint between sections of a concrete duct adapted subsequentlyto be poured into the ditch, which forms an outer mold form therefor,and sheets of U-shaped metal 18 comprising an inner form for the duct.

Each gasket assembly comprises a resilient rubber ited States Patent2,969,615 Patented Jan. 31, 1961 "ice gasket member 41 having a centralU-shaped opening 42 of a configuration and size to accommodate a formmember 18.

The gasket assembly 40 also includes face plates or weight members 43and 44 on opposite sides thereof, each provided with horizontallyprojecting right angularly disposed anchoring rods 45 and 46respectively extending at right angles from the opposite faces thereofwhich are adapted to project into the concrete of the duct as it isformed so as to be embedded therein. All of these rods are disposed inspaced relation exteriorly of the central U-shaped opening 42.

Each of plates or weights 43 and 44 are formed with a large number ofspaced holes 43a and 44a respective- :ly which extend through therespective plates, and into which protrude fingers 43b and 44brespectively which comprise portions of rubber gasket 41.

In the manufacture of the assembly 40, the weights 43' and 44 arepositioned in a mold and the rubber material forming the gasket 41 ispoured therebetween in liquid form to ooze into holes 43a and 44a. Thusthe fingers 43b and 44b will provide a bond between gasket 41 and platesor weights 43 and 44, as well as provide rubber material at the ends offingers 43b in direct contact with the concrete when the gasket assemblyis embedded in the concrete forming the duct.

It is to be understood that the gasket assembly forms a permanent partof the concrete duct, and provides a compressible expansion joint whichis substantially leak proof, and firmly secured to the opposite ends ofconfronting ducts.

From the foregoing it will now be seen that there is herein provided animproved gasket construction which accomplishes all of the objects ofthis invention, and others, including many advantages of great practicalutility and commercial importance.

As various embodiments may be made of this inventive concept, and asvarious modifications may be made in the embodiment hereinbefore shownand described, it is to be understood that all matter herein is to beinterpreted merely as illustrative and not in a limiting sense.

I claim:

A gasket for interposing between the confronting ends of alignedconcrete ducts, comprising a pair of parallel spaced identical plateshaving central substantially U- shaped openings, said plates having aplurality of aligned openings, a thick rubber gasket disposed betweenthe plates, portions of said rubber gasket filling said aligningopenings, uniting said plates, and a plurality of anchor rods having oneof their respective ends aflixed to and projecting at right angles fromthe outer sides of each of said plates, providing anchors for saidgasket anchoring the gasket to a concrete plastic foundation surroundingsaid gasket.

References Cited in the file of this patent UNITED STATES PATENTS749,765 Wight et a1. Jan. 19, 1904 1,819,694 Sperry Aug. 18, 19311,942,489 Pfefferle Jan. 9, 1934 2,116,746 Wells May 10, 1938 2,249,510Welker July 15, 1941 2,365,550 Heitzel Dec. 19, 1944 2,422,266 SteinkeJune 17, 1947 2,518,640 Purinton Aug. 15, 1950 2,798,746 Hoyer July 9,1957

